y = 3x + 9 |
y = 5x + 17 |
3x + 9 = 5x + 17 | | - 3x |
9 = 2x + 17 | | - 17 |
-8 = 2x | | : 2 |
-4 = x | |
Einsetzen in 1. Gleichung | |
y = 3 · (-4) + 9 = -3 | |
L = { (-4|-3) } |
5y -15x = -10 |
y = -2x + 3 |
5 · (-2x + 3) -15x = -10 | | T |
-10x + 15 -15x = -10 | | T |
-25x + 15 = -10 | | -15 |
-25x = -25 | | :(-25) |
x = 1 | |
Einsetzen in 2. Gleichung | |
y = -2 · 1 + 3 = 1 | |
L = { (1|1) } |
12x -4y = 52 |
20x + 4y = 76 |
I + II: 32x = 128 | | : 32 |
x = 4 | |
Einsetzen in 1. Gleichung | |
12 · 4 -4y = 52 | | T |
48 -4y = 52 | | -48 |
-4y = 4 | | : (-4) |
y = -1 | |
L = { (4|-1) } |
-2x -5y = -28 |
-4x -3y = -28 |
-2x -5y = -28 | | · (-2) | |
-4x -3y = -28 | | · 1 | |
4x + 10y = 56 | 1. und 2. Gl. | |
-4x -3y = -28 | addieren | |
7y = 28 | | : 7 | |
y = 4 | ||
In 1. Gleichung einsetzen: | ||
-2x -5·4 = -28 | |T | |
-2x -20 = -28 | | +20 | |
-2x = -8 | | :(-2) | |
x = 4 | ||
L = { (4|4) } |
y = 3x + 11 |
y = -2x -14 |
-5y + 25x = 65 |
y = -1x -1 |
5x -5y = 35 |
25x + 5y = 115 |
y = -5x -7 |
y = 1x + 5 |
3y -9x = -21 |
y = -5x + 17 |
-16x -4y = -8 |
-8x + 4y = -16 |